Replacing stem and handlebars on a Trek 930
 

I have a Trek 930 from the mid-90's and I would like to change the stem and handlebars on it. From what I have figured out, the current stem on the bike is a 1" threaded stem. I would like to put an adjustable stem on the bike like this one I have found on amazon.com:
http://www.amazon.com/Avenir-Adjusta...4696195&sr=1-1
This stem is available in 90mm and 110mm. I am assuming this measurement refers to the length of the stem that fits into the bike. Will this stem work for me?

I am also wanting to swap the flat handlebars for something like this:
http://www.amazon.com/Wald-5-25-Inch...4696222&sr=1-7
Will these handlebars fit with the stem I listed above?

Thank you for your help.

1" threaded forks use a 7/8" quill , then the second data measure is the bar clamp.
mtb and many utility bike handlebars are offered in 1'' center clamp type.

amazon going to do the work too? :roflmao2:

So, perhaps buying from one of the many Bay area Bike shops is highly recommended.
they will help you get the right length, so the bike May be more comfortable to ride it more.

Yep, careful you're not measuring stem quill diameter to reach your conclusion. It's steerer diameter that's the spec for forks/headsets/stems.

And the 90 or 110 do not refer to length of quill but rather the length of stem from center of quill bolt to center of bar clamp. This dimension reduces a bit as you raise adjustable stems, I imagine they take the measurement with the stem @ 90 degrees.

Thank you for your quick reply. I figured I would do the work myself. Given the age of the bike and the fact that newer bikes have threadless stems, I figured my local bike shops wouldn't have the parts needed to make the change for me.

I don't know the measurements of the different parts involved and if what I have found would work together and with my bike.

It may but as Bob points out the clamp measurement is missing from the stem and the clamp aera measurement is missing from the bars.

Also on those cheap wald bars you may also have trouble getting your shifters and brake levers to clamp tight.

This may inded be a job best left to the bike shop.


the local shop can order the parts needed just as you can and more importantly they can order parts that fit the bike and fit together.

You will also need longer shifter and brake cables. Does your current stem have the front brake cable running through it? If so then you need a cable hanger placed on the steerer tube also.

It may take a couple of tries to find the right shop but there are plenty in your area that'll have the parts needed. Might ask for best shop for old parts in the NorCal subforum.

Oh, and that Amazon ad doesn't give specs for the clamp diameter of the stem, but probably 1" so will probably work with those bars but cannot guarantee from information provided.

High rise bars + adjustable stem? You really want to raise your bars MORE than 5" ??? That's a LOT. There are bars with higher rise if you don't wanna mess with buying stem and bars.

Wald has 6", 10" and 13" rise options, but they have swept grip areas, dunno if that's OK with you.

Thank you for the suggestions. I will post a question in the NorCal subforum and go from there. I also need to get the rear shifter/break lever replaced because the upshifting part of the shifter is working sporadically.

"Does your current stem have the front brake cable running through it? If so then you need a cable hanger placed on the steerer tube also." A fork crown mounted rather than steerer mounted cable hanger will help eliminate brake chatter if you do have canti brakes.

All Wald bars are 25.4mm, or 1 inch, so that's one of the missing measurements. You still need to make sure that it fits with the stem, which could be either 25.4, 26 or (it's unlikely but possible) 31.8mm.

It's a non-trivial endeavor, and unless you are looking for an expensive learning experience, I might suggest leaving it to the professionals.

As far as Wald handlebars, while they may not cost much, they are very well made and durable as all get out. There is nothing wrong with them. Well they are heavy, but I have the feeling that doesn't matter too much to you.